 |
Blue Energy's dream is to mesh millions of frictional nanogenerators that capture low-frequency sea-wave energy. The illustration is a network-like virtual structure diagram. The upper right corner is a designed spherical nanogenerator.
The ocean is the cradle of human beings, and it also contains enormous energy. In theory, the ocean can fully meet all the energy needs on the earth, and it will not cause any pollution to the atmosphere. It is a way to permanently solve the world's energy needs. At present, the Chinese Academy of Sciences Beijing Institute of Nano-Energy and System Wang Zhonglin team is working on a stable and practical wave power generation network device based on friction nano-power generation technology. Once this technical problem is broken, it will trigger a wave power technology revolution and accelerate China's marine new energy development speed has significant milestones in ensuring energy security, environmental protection, and sustainable development. This "blue energy" technology was first proposed by Wang Zhonglin in 2014. Recently, he analyzed the development and characteristics of existing wave energy power generation devices at home and abroad, summarized the technical and industrial advantages of frictional nanopower generation for wave energy collection, pointed out the key issues and future development trends of wave energy friction power generation. Relevant research results were published in the form of a review on the latest issue of Nature (DOI: 10.1038/542159a) on February 9.
Compared with traditional green energy, blue energy has geographical advantages. The ocean covers 70% of the earth's surface. About 44% of the world’s population lives within 150 km of the coastline. Human resources have been requested from the sea. Become an inevitable trend. Ocean wave energy refers to the kinetic energy and potential energy of waves on the surface of the ocean. It is divided into three types: wind waves, surges and near-shore waves. It has the advantages of high energy density and wide distribution. It is estimated that the energy contained in the waves on the Earth is equivalent to 90 trillion kwh electricity. Wave energy is now used in the form of absorption of large areas of wave energy, and concentrated into mechanical energy, and then driving the electromagnetic generator to generate electricity. As the world’s fastest-growing form of ocean energy use, the United States, Japan, the United Kingdom, Spain, Sweden, and Denmark have all attached great importance to wave energy research and have established wave power plants at sea. However, the power generation is widespread. Insufficient power generation, low conversion efficiency, especially in small waves, the efficiency of capturing wave energy is not high.
The important research field of using ocean energy to generate electricity has been progressing slowly. The difficulties in the development of marine wave power generation are very difficult. The main reason is that the developed wave energy collector is a traditional electromagnetic generator based on Faraday's electromagnetic induction law. Its output Voltage and current are proportional to the mechanical energy frequency, and the output power is proportional to the square of the mechanical energy frequency. Therefore, a stable and high operating frequency (>10Hz) is required to obtain high-efficiency output, but waves, tides, and ocean currents in the ocean The frequency of motion is low (0.1~2Hz), and the waves are fickle and motion is irregular. These magnets and coils can only collect the energy of the water flow, the direction is relatively simple, and these devices must be installed on the seashore, not only affecting the landscape. Moreover, the collection efficiency is very low, and it is impossible to collect the energy in deep water areas, which greatly limits its practical application value. At the same time, such large and heavy equipment has high manufacturing costs, making the ocean a most expensive form of energy on Earth. In contrast, in 2012, when Wang Zhonglin first invented the friction nano-generator, the output current was proportional to the mechanical energy frequency over a wide frequency range, and the output efficiency of the friction nano-generator was far lower for sea wave fluctuations below 5 Hz. Higher than the electromagnetic generator, it is very suitable for collecting blue energy, and can stabilize the output power under the conditions of slow flow and random wave flow.
Wang Zhonglin draws inspiration from emerging technologies that use human motion to ingest energy and apply it to ocean water wave power generation. The Beijing Nano Energy Institute he heads is developing such equipment, from heartbeat-driven medical sensors to foot-trigger carpet-generated lighting, from health care to safety monitoring, from wearable and soft electronic systems to environmental governance, friction. The innovative applications of nanopower generation are increasingly embedded in our daily production and life. Frictional nanogenerators have high conversion efficiency and can convert 50% of energy from kinetic energy to electrical energy. It is the use of two different materials in contact with the surface static charge generated by the resulting time-varying electric field to drive the flow of electrons. The nano-generators that make up this large-scale network consist of many friction power generation balls (see figure), using traditional materials, and low prices, such as polytetrafluoroethylene, rubber, polyfluorinated ethylene propylene, etc., and are suitable for large-scale production and commercialization. . This type of nano-power generating ball, which collects wave energy, floats in seawater, in which a ball made of a dielectric material rolls inside another ball to generate a triboelectric charge. It can efficiently and sensitively recover the kinetic energy resources in the ocean, including the fluctuation of water, the waves, currents, and sea water. When the sea wave drives the ball to shake two or three times per second, about 1 to 10 milliwatts of power can be generated. This kind of power generation network can be distributed in deep water areas far from the coast and fairways, and will not affect people’s lives and enjoyment activities along the coast. According to theoretical calculations, for such a sea area as the size of Shandong Province, if a 10-meter-deep water is filled with such a grid of electricity generation, the amount of electricity it emits can meet the energy needs of the world. If this dream of blue energy is realized, the world’s energy landscape will fundamentally change, and fossil fuels that rely on oil and coal will become history.
Currently, blue energy is still in the early stage of laboratory R&D. To achieve long-term reliable operation, there are still many key technical issues that need to be solved. There must be a large number of theoretical studies on hydrodynamic performance, model tests, and nano-power generation structure design. Work and accumulate practical experience. Such as research to improve the durability and corrosion resistance of nano-power generation materials; research wiring structure and transmission against storm and harsh environments. At the same time, it is necessary to consider the location and size of the blue energy generation network and minimize the impact on shipping, marine life and ecology. Ocean Blue Energy Power Generation is a systematic project. The establishment of a research institute devoted to blue energy will greatly accelerate the development of this clean and sustainable energy technology. At the same time, it needs special government funds, policy support, and private investors. The major energy companies have invested funds in the initial period, and before the large-scale commercial development has been realized, they will first develop and construct a small number of distributed wave energy power generation or island microgrids.
Relying on marine technology, implementing the “blue energy†strategy can save conventional energy, reduce environmental pollution, and improve energy structure. This “blue energy†has tremendous advantages and will eventually surpass “green energy†and become Solar energy is cheaper, more reliable, and more stable than solar panels and wind turbines. It does not depend on weather and day-and-night changes. It can also be supplemented with other renewable energy sources to ensure the total supply of energy to the grid. The Blue Energy and Friction Nanogenerators are the original discoveries and inventions of the Wang Zhonglin team. They have been focusing on micro-nano energy for fifteen years. This nano-energy can also affect large energy sources. If the blue energy dream is realized, it will benefit all generations.
Guangdong Jia Mei Biological Technology Co.Ltd , https://www.jaymeimask.com